Google is now offering a Google Voice invite to anyone with an .edu eMail address, Fortune reports. The announcement, made on the official Google Voice Blog, lets the floodgates open to higher-ed users interested in managing their voice communications with Google. Google offers a free phone number, voice mail transcription, call routing, cheap international calling, and many other features with Voice. Until now, the free service had been available by invitation only, but now students, faculty, and anyone else with a school eMail address can sign up. The service now counts 1.4 million U.S. users but probably will explode with the current offer. Google also is expected to announce a fuller-featured VoIP service integrating its purchase of Gizmo5 last year. In fact, part of the Google Voice setup also includes a link to “Gizmo” SIP services…

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